Emil skriwan



(No Model.)

B. SKRIWAN. PROCESS OF AND APPARATUS FOR HEMMING ENDS 0P INGANDBSGENTMANTLBS.

Patented Mar 16, 18 97.

Jizwifaz M JW 7 UNITED STATES PATENT OFFICE.

EMIL SKRTWAN, OF VIENNA, AUSTRIA-HUNGARY.

PROCESS OF AND APPARATUS FOR HEMMING ENDS 0F INCANDESCENT MANTLES.

SPECIFICATION forming part of Letters Patent N 0. 578,841, dated March16, 1897. Application filed December 18, 1896. Serial No. 616,172. (Nomodel.)

To all whom it may concern.-

Be it known that I, EMIL SKRIWAN, a subject of the Emperor ofAustria-Hungary, and a resident of Vienna, in the Empire of Austria-Hungary, have invented a certain new and useful Process of and Apparatusfor I-Iemmin g the Ends of Incandescent Mantles, of which the followingis a full, clear, and exact description.

The present invention consists of a process and apparatus'forhemming theedges of mantles for incandescent lighting. According to the same themantle is first placed over a hol low cylinder, then the strip formingthe hem placed round the end of the cylinder, so as to extend half overthe mantle and half above the end of the cylinder,and the part of thestrip extending above the cylinder is then turned into the latter andproperly retain ed in position by inserting a flanged stopper into saidcylinder end. The upper end of the cylinder is provided with verticalslots extending from the top downward, by means of which the hem thussecured by the stopper may be provisionally fixed to the mantle end bymeans of pins inserted through the said slots or slot; and in order torender the present specification more easily intelligible reference ishad to the accompanying drawings, in which similar letters of referencedenote similar parts throughout the several views.

Figure 1 is a perspective elevation of the hollow cylinder with themantle thereon Fig. 2, a similar elevation with the hem round thecylinder end. Fig. 3shows the end of the hem tucked into the cylinder;Fig. 4c, the stopper in the end of the cylinder; Fig. 5, the hemprovisionally secured by means of the pins as above described.

The material of which the mantle m is formed is placed on thehollowcylinder at, as shown at Fig. 1. The material or strip of material n,forming the hem, is then placed around the upper end of the cylinder at,as shown at Fig. 2, about one half of said strip being around themantle, which is flush with the upper end of the cylinder, and the otherhalf standing over or above the end of the cylinder. The part of thestrip extending upwardly is then tucked into the cylinder, as at Fig. 3,and the stopper 1), which fits the cylinder and is provided with aflange which closes down onto the upper edge of the said cylinder isplaced in the end of the same and presses the inner part of the hemproperly into position. The upper end of the cylinder is provided with avertically-arranged slot a or with several slots intowhich apin 0 may bestuck through the mantle and the hem, as shown at Fig. 5, in order toprovisionally secure the latter to the former. The mantle with the hemis now taken 01f the cylinder and the hem sewed onto themantle in theusual manner.

I claim as my invention- 1. A process for hemming the ends ofincandescent mantles which consists of placing the mantle over a hollowcylinder with its end flush with the end of the said cylinder, placingthe strip of material forming the hem round the end of the cylinderoutside the mantle with about half its breadth extending above the endof the cylinder, tucking the extending part of said strip into thecylinder, and properly smoothing the same therein by means of a stopperto fit the cylinder and provisionally securing the hem to the mantle endby means of a pin or the like, substantially as described.

2. An apparatus for securing the hem to the ends of incandescentmantles, consisting of a hollow cylinder having in its end a suitableslot extending vertically downward and a stopper having annular flangeto fit the end of said cylinder in the manner and for the purposesubstantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

EMIL SKRIXVAN.

Witnesses:

HARRY BELMONT, KARL RocH.

